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2023-08-21scripts/gdb/vmalloc: add vmallocinfo supportKuan-Ying Lee1-0/+1
This GDB script shows the vmallocinfo for user to analyze the vmalloc memory usage. Example output: 0xffff800008000000-0xffff800008009000 36864 <start_kernel+372> pages=8 vmalloc 0xffff800008009000-0xffff80000800b000 8192 <gicv2m_init_one+400> phys=0x8020000 ioremap 0xffff80000800b000-0xffff80000800d000 8192 <bpf_prog_alloc_no_stats+72> pages=1 vmalloc 0xffff80000800d000-0xffff80000800f000 8192 <bpf_jit_alloc_exec+16> pages=1 vmalloc 0xffff800008010000-0xffff80000ad30000 47316992 <paging_init+452> phys=0x40210000 vmap 0xffff80000ad30000-0xffff80000c1c0000 21561344 <paging_init+556> phys=0x42f30000 vmap 0xffff80000c1c0000-0xffff80000c370000 1769472 <paging_init+592> phys=0x443c0000 vmap 0xffff80000c370000-0xffff80000de90000 28442624 <paging_init+692> phys=0x44570000 vmap 0xffff80000de90000-0xffff80000f4c1000 23269376 <paging_init+788> phys=0x46090000 vmap 0xffff80000f4c1000-0xffff80000f4c3000 8192 <gen_pool_add_owner+112> pages=1 vmalloc 0xffff80000f4c3000-0xffff80000f4c5000 8192 <gen_pool_add_owner+112> pages=1 vmalloc 0xffff80000f4c5000-0xffff80000f4c7000 8192 <gen_pool_add_owner+112> pages=1 vmalloc Link: https://lkml.kernel.org/r/20230808083020.22254-9-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-08-21scripts/gdb/slab: add slab supportKuan-Ying Lee1-0/+1
Add 'lx-slabinfo' and 'lx-slabtrace' support. This GDB scripts print slabinfo and slabtrace for user to analyze slab memory usage. Example output like below: (gdb) lx-slabinfo Pointer | name | active_objs | num_objs | objsize | objperslab | pagesperslab ------------------ | -------------------- | ------------ | ------------ | -------- | ----------- | ------------- 0xffff0000c59df480 | p9_req_t | 0 | 0 | 280 | 29 | 2 0xffff0000c59df280 | isp1760_qh | 0 | 0 | 160 | 25 | 1 0xffff0000c59df080 | isp1760_qtd | 0 | 0 | 184 | 22 | 1 0xffff0000c59dee80 | isp1760_urb_listite | 0 | 0 | 136 | 30 | 1 0xffff0000c59dec80 | asd_sas_event | 0 | 0 | 256 | 32 | 2 0xffff0000c59dea80 | sas_task | 0 | 0 | 448 | 36 | 4 0xffff0000c59de880 | bio-120 | 18 | 21 | 384 | 21 | 2 0xffff0000c59de680 | io_kiocb | 0 | 0 | 448 | 36 | 4 0xffff0000c59de480 | bfq_io_cq | 0 | 0 | 1504 | 21 | 8 0xffff0000c59de280 | bfq_queue | 0 | 0 | 720 | 22 | 4 0xffff0000c59de080 | mqueue_inode_cache | 1 | 28 | 1152 | 28 | 8 0xffff0000c59dde80 | v9fs_inode_cache | 0 | 0 | 832 | 39 | 8 ... (gdb) lx-slabtrace --cache_name kmalloc-1k 63 <tty_register_device_attr+508> waste=16632/264 age=46856/46871/46888 pid=1 cpus=6, 0xffff800008720240 <__kmem_cache_alloc_node+236>: mov x22, x0 0xffff80000862a4fc <kmalloc_trace+64>: mov x21, x0 0xffff8000095d086c <tty_register_device_attr+508>: mov x19, x0 0xffff8000095d0f98 <tty_register_driver+704>: cmn x0, #0x1, lsl #12 0xffff80000c2677e8 <vty_init+620>: Cannot access memory at address 0xffff80000c2677e8 0xffff80000c265a10 <tty_init+276>: Cannot access memory at address 0xffff80000c265a10 0xffff80000c26d3c4 <chr_dev_init+204>: Cannot access memory at address 0xffff80000c26d3c4 0xffff8000080161d4 <do_one_initcall+176>: mov w21, w0 0xffff80000c1c1b58 <kernel_init_freeable+956>: Cannot access memory at address 0xffff80000c1c1b58 0xffff80000acf1334 <kernel_init+36>: bl 0xffff8000081ac040 <async_synchronize_full> 0xffff800008018d00 <ret_from_fork+16>: mrs x28, sp_el0 (gdb) lx-slabtrace --cache_name kmalloc-1k --free 428 <not-available> age=4294958600 pid=0 cpus=0, Link: https://lkml.kernel.org/r/20230808083020.22254-8-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-08-21scripts/gdb/page_owner: add page owner supportKuan-Ying Lee1-0/+1
This GDB script prints page owner information for user to analyze the memory usage or memory corruption issue. Example output from an aarch64 system: (gdb) lx-dump-page-owner --pfn 655360 page_owner tracks the page as allocated Page last allocated via order 0, gfp_mask: 0x8, pid: 1, tgid: 1 ("swapper/0\000\000\000\000\000\000"), ts 1295948880 ns, free_ts 1011852016 ns PFN: 655360, Flags: 0x3fffc0000000000 0xffff8000086ab964 <post_alloc_hook+452>: ldp x19, x20, [sp, #16] 0xffff80000862e4e0 <split_map_pages+344>: cbnz w22, 0xffff80000862e57c <split_map_pages+500> 0xffff8000086370c4 <isolate_freepages_range+556>: mov x0, x27 0xffff8000086bc1cc <alloc_contig_range+808>: mov x24, x0 0xffff80000877d6d8 <cma_alloc+772>: mov w1, w0 0xffff8000082c8d18 <dma_alloc_from_contiguous+104>: ldr x19, [sp, #16] 0xffff8000082ce0e8 <atomic_pool_expand+208>: mov x19, x0 0xffff80000c1e41b4 <__dma_atomic_pool_init+172>: Cannot access memory at address 0xffff80000c1e41b4 0xffff80000c1e4298 <dma_atomic_pool_init+92>: Cannot access memory at address 0xffff80000c1e4298 0xffff8000080161d4 <do_one_initcall+176>: mov w21, w0 0xffff80000c1c1b50 <kernel_init_freeable+952>: Cannot access memory at address 0xffff80000c1c1b50 0xffff80000acf87dc <kernel_init+36>: bl 0xffff8000081ab100 <async_synchronize_full> 0xffff800008018d00 <ret_from_fork+16>: mrs x28, sp_el0 page last free stack trace: 0xffff8000086a6e8c <free_unref_page_prepare+796>: mov w2, w23 0xffff8000086aee1c <free_unref_page+96>: tst w0, #0xff 0xffff8000086af3f8 <__free_pages+292>: ldp x19, x20, [sp, #16] 0xffff80000c1f3214 <init_cma_reserved_pageblock+220>: Cannot access memory at address 0xffff80000c1f3214 0xffff80000c20363c <cma_init_reserved_areas+1284>: Cannot access memory at address 0xffff80000c20363c 0xffff8000080161d4 <do_one_initcall+176>: mov w21, w0 0xffff80000c1c1b50 <kernel_init_freeable+952>: Cannot access memory at address 0xffff80000c1c1b50 0xffff80000acf87dc <kernel_init+36>: bl 0xffff8000081ab100 <async_synchronize_full> 0xffff800008018d00 <ret_from_fork+16>: mrs x28, sp_el0 Link: https://lkml.kernel.org/r/20230808083020.22254-7-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-08-21scripts/gdb/stackdepot: add stackdepot supportKuan-Ying Lee1-0/+1
Add support for printing the backtrace of stackdepot handle. This is the preparation patch for dumping page_owner, slabtrace usage. Link: https://lkml.kernel.org/r/20230808083020.22254-6-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-08-21scripts/gdb/aarch64: add aarch64 page operation helper commands and configsKuan-Ying Lee1-1/+2
1. Move page table debugging from mm.py to pgtable.py. 2. Add aarch64 kernel config and memory constants value. 3. Add below aarch64 page operation helper commands. page_to_pfn, page_to_phys, pfn_to_page, page_address, virt_to_phys, sym_to_pfn, pfn_to_kaddr, virt_to_page. 4. Only support CONFIG_SPARSEMEM_VMEMMAP=y now. Link: https://lkml.kernel.org/r/20230808083020.22254-5-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-04-19scripts/gdb: create linux/vfs.py for VFS related GDB helpersGlenn Washburn1-0/+1
Patch series "GDB VFS utils". I've created a couple GDB convenience functions that I found useful when debugging some VFS issues and figure others might find them useful. For instance, they are useful in setting conditional breakpoints on VFS functions where you only care if the dentry path is a certain value. I took the opportunity to create a new "vfs" python module to give VFS related utilities a home. This patch (of 2): This will allow for more VFS specific GDB helpers to be collected in one place. Move utils.dentry_name into the vfs modules. Also a local variable in proc.py was changed from vfs to mnt to prevent a naming collision with the new vfs module. [akpm@linux-foundation.org: add SPDX-License-Identifier] Link: https://lkml.kernel.org/r/cover.1677631565.git.development@efficientek.com Link: https://lkml.kernel.org/r/7bba4c065a8c2c47f1fc5b03a7278005b04db251.1677631565.git.development@efficientek.com Signed-off-by: Glenn Washburn <development@efficientek.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Antonio Borneo <antonio.borneo@foss.st.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: John Ogness <john.ogness@linutronix.de> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Petr Mladek <pmladek@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-04-19scripts/gdb: print interruptsFlorian Fainelli1-0/+1
This GDB script prints the interrupts in the system in the same way that /proc/interrupts does. This does include the architecture specific part done by arch_show_interrupts() for x86, ARM, ARM64 and MIPS. Example output from an ARM64 system: (gdb) lx-interruptlist CPU0 CPU1 CPU2 CPU3 10: 3167 1225 1276 2629 GICv2 30 Level arch_timer 13: 0 0 0 0 GICv2 36 Level arm-pmu 14: 0 0 0 0 GICv2 37 Level arm-pmu 15: 0 0 0 0 GICv2 38 Level arm-pmu 16: 0 0 0 0 GICv2 39 Level arm-pmu 28: 0 0 0 0 interrupt-controller@8410640 5 Edge brcmstb-gpio-wake 30: 125 0 0 0 GICv2 128 Level ttyS0 31: 0 0 0 0 interrupt-controller@8416000 0 Level mspi_done 32: 0 0 0 0 interrupt-controller@8410640 3 Edge brcmstb-waketimer 33: 0 0 0 0 interrupt-controller@8418580 8 Edge brcmstb-waketimer-rtc 34: 872 0 0 0 GICv2 230 Level brcm_scmi@0 35: 0 0 0 0 interrupt-controller@8410640 10 Edge 8d0f200.usb-phy 37: 0 0 0 0 GICv2 97 Level PCIe PME 42: 0 0 0 0 GICv2 145 Level xhci-hcd:usb1 43: 94 0 0 0 GICv2 71 Level mmc1 44: 0 0 0 0 GICv2 70 Level mmc0 IPI0: 23 666 154 98 Rescheduling interrupts IPI1: 247 1053 1701 634 Function call interrupts IPI2: 0 0 0 0 CPU stop interrupts IPI3: 0 0 0 0 CPU stop (for crash dump) interrupts IPI4: 0 0 0 0 Timer broadcast interrupts IPI5: 7 9 5 0 IRQ work interrupts IPI6: 0 0 0 0 CPU wake-up interrupts ERR: 0 Link: https://lkml.kernel.org/r/20230406220451.1583239-1-f.fainelli@gmail.com Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-04-19scripts/gdb: raise error with reduced debugging informationFlorian Fainelli1-1/+4
If CONFIG_DEBUG_INFO_REDUCED is enabled in the kernel configuration, we will typically not be able to load vmlinux-gdb.py and will fail with: Traceback (most recent call last): File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/vmlinux-gdb.py", line 25, in <module> import linux.utils File "/home/fainelli/work/buildroot/output/arm64/build/linux-custom/scripts/gdb/linux/utils.py", line 131, in <module> atomic_long_counter_offset = atomic_long_type.get_type()['counter'].bitpos KeyError: 'counter' Rather be left wondering what is happening only to find out that reduced debug information is the cause, raise an eror. This was not typically a problem until e3c8d33e0d62 ("scripts/gdb: fix 'lx-dmesg' on 32 bits arch") but it has since then. Link: https://lkml.kernel.org/r/20230406215252.1580538-1-f.fainelli@gmail.com Fixes: e3c8d33e0d62 ("scripts/gdb: fix 'lx-dmesg' on 32 bits arch") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Antonio Borneo <antonio.borneo@foss.st.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: John Ogness <john.ogness@linutronix.de> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Petr Mladek <pmladek@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-04-19scripts/gdb: add a Radix Tree ParserKieran Bingham1-0/+1
Linux makes use of the Radix Tree data structure to store pointers indexed by integer values. This structure is utilised across many structures in the kernel including the IRQ descriptor tables, and several filesystems. This module provides a method to lookup values from a structure given its head node. Usage: The function lx_radix_tree_lookup, must be given a symbol of type struct radix_tree_root, and an index into that tree. The object returned is a generic integer value, and must be cast correctly to the type based on the storage in the data structure. For example, to print the irq descriptor in the sparse irq_desc_tree at index 18, try the following: (gdb) print (struct irq_desc)$lx_radix_tree_lookup(irq_desc_tree, 18) This script previously existed under commit e127a73d41ac471d7e3ba950cf128f42d6ee3448 ("scripts/gdb: add a Radix Tree Parser") and was later reverted with b447e02548a3304c47b78b5e2d75a4312a8f17e1i (Revert "scripts/gdb: add a Radix Tree Parser"). This version expects the XArray based radix tree implementation and has been verified using QEMU/x86 on Linux 6.3-rc5. [f.fainelli@gmail.com: revive and update for xarray implementation] [f.fainelli@gmail.com: guard against a NULL node in the while loop] Link: https://lkml.kernel.org/r/20230405222743.1191674-1-f.fainelli@gmail.com Link: https://lkml.kernel.org/r/20230404214049.1016811-1-f.fainelli@gmail.com Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-02-03scripts/gdb: add mm introspection utilsDmitrii Bundin1-0/+1
This command provides a way to traverse the entire page hierarchy by a given virtual address on x86. In addition to qemu's commands info tlb/info mem it provides the complete information about the paging structure for an arbitrary virtual address. It supports 4KB/2MB/1GB and 5 level paging. Here is an example output for 2MB success translation: (gdb) translate-vm address cr3: cr3 binary data 0x1085be003 next entry physical address 0x1085be000 --- bit 3 page level write through False bit 4 page level cache disabled False level 4: entry address 0xffff8881085be7f8 page entry binary data 0x800000010ac83067 next entry physical address 0x10ac83000 --- bit 0 entry present True bit 1 read/write access allowed True bit 2 user access allowed True bit 3 page level write through False bit 4 page level cache disabled False bit 5 entry has been accessed True bit 7 page size False bit 11 restart to ordinary False bit 63 execute disable True level 3: entry address 0xffff88810ac83a48 page entry binary data 0x101af7067 next entry physical address 0x101af7000 --- bit 0 entry present True bit 1 read/write access allowed True bit 2 user access allowed True bit 3 page level write through False bit 4 page level cache disabled False bit 5 entry has been accessed True bit 7 page size False bit 11 restart to ordinary False bit 63 execute disable False level 2: entry address 0xffff888101af7368 page entry binary data 0x80000001634008e7 page size 2MB page physical address 0x163400000 --- bit 0 entry present True bit 1 read/write access allowed True bit 2 user access allowed True bit 3 page level write through False bit 4 page level cache disabled False bit 5 entry has been accessed True bit 7 page size True bit 6 page dirty True bit 8 global translation False bit 11 restart to ordinary True bit 12 pat False bits (59, 62) protection key 0 bit 63 execute disable True [dmitrii.bundin.a@gmail.com: add SPDX line, other tweaks] Link: https://lkml.kernel.org/r/20230113175151.22278-1-dmitrii.bundin.a@gmail.com [akpm@linux-foundation.org: s/physicall/physical/] Link: https://lkml.kernel.org/r/20230102171014.31408-1-dmitrii.bundin.a@gmail.com Signed-off-by: Dmitrii Bundin <dmitrii.bundin.a@gmail.com> Acked by: Mike Rapoport (IBM) <rppt@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2022-07-30scripts/gdb: ensure the absolute path is generated on initial sourceAaron Tomlin1-1/+1
Post 'make scripts_gdb' a symbolic link to scripts/gdb/vmlinux-gdb.py is created. Currently 'os.path.dirname(__file__)' does not generate the absolute path to scripts/gdb resulting in the following: (gdb) source vmlinux-gdb.py Traceback (most recent call last): File "scripts/gdb/vmlinux-gdb.py", line 25, in <module> import linux.utils ModuleNotFoundError: No module named 'linux' This patch ensures that the absolute path to scripts/gdb in relation to the given file is generated so each module can be located accordingly. Link: https://lkml.kernel.org/r/20220712110248.1404125-1-atomlin@redhat.com Signed-off-by: Aaron Tomlin <atomlin@redhat.com> Reviewed-by: Douglas Anderson <dianders@chromium.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2019-07-17scripts/gdb: add helpers to find and list devicesLeonard Crestez1-0/+1
Add helper commands and functions for finding pointers to struct device by enumerating linux device bus/class infrastructure. This can be used to fetch subsystem and driver-specific structs: (gdb) p *$container_of($lx_device_find_by_class_name("net", "eth0"), "struct net_device", "dev") (gdb) p *$container_of($lx_device_find_by_bus_name("i2c", "0-004b"), "struct i2c_client", "dev") (gdb) p *(struct imx_port*)$lx_device_find_by_class_name("tty", "ttymxc1")->parent->driver_data Several generic "lx-device-list" functions are included to enumerate devices by bus and class: (gdb) lx-device-list-bus usb (gdb) lx-device-list-class (gdb) lx-device-list-tree &platform_bus Similar information is available in /sys but pointer values are deliberately hidden. Link: http://lkml.kernel.org/r/c948628041311cbf1b9b4cff3dda7d2073cb3eaa.1561492937.git.leonard.crestez@nxp.com Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Reviewed-by: Stephen Boyd <sboyd@kernel.org> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-17scripts/gdb: add lx-genpd-summary commandLeonard Crestez1-0/+1
This is like /sys/kernel/debug/pm/pm_genpd_summary except it's accessible through a debugger. This can be useful if the target crashes or hangs because power domains were not properly enabled. Link: http://lkml.kernel.org/r/f9ee627a0d4f94b894aa202fee8a98444049bed8.1561492937.git.leonard.crestez@nxp.com Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Reviewed-by: Stephen Boyd <sboyd@kernel.org> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-15scripts/gdb: initial clk support: lx-clk-summaryLeonard Crestez1-0/+1
Add an lx-clk-summary command which prints a subset of /sys/kernel/debug/clk/clk_summary. This can be used to examine hangs caused by clk not being enabled. Link: http://lkml.kernel.org/r/Message-ID: Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-15scripts/gdb: add a timer list commandStephen Boyd1-0/+1
Implement a command to print the timer list, much like how /proc/timer_list is implemented. This can be used to look at the pending timers on a crashed system. [swboyd@chromium.org: v2] Link: http://lkml.kernel.org/r/20190329220844.38234-5-swboyd@chromium.org Link: http://lkml.kernel.org/r/20190325184522.260535-5-swboyd@chromium.org Signed-off-by: Stephen Boyd <swboyd@chromium.org> Cc: Douglas Anderson <dianders@chromium.org> Cc: Nikolay Borisov <n.borisov.lkml@gmail.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jackie Liu <liuyun01@kylinos.cn> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-15scripts/gdb: add rb tree iterating utilitiesStephen Boyd1-0/+1
Implement gdb functions for rb_first(), rb_last(), rb_next(), and rb_prev(). These can be useful to iterate through the kernel's red-black trees. [swboyd@chromium.org: v2] Link: http://lkml.kernel.org/r/20190329220844.38234-4-swboyd@chromium.org Link: http://lkml.kernel.org/r/20190325184522.260535-4-swboyd@chromium.org Signed-off-by: Stephen Boyd <swboyd@chromium.org> Cc: Douglas Anderson <dianders@chromium.org> Cc: Nikolay Borisov <n.borisov.lkml@gmail.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jackie Liu <liuyun01@kylinos.cn> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-15scripts/gdb: add kernel config dumping commandStephen Boyd1-0/+1
lx-configdump <file> dumps the contents of the gzipped .config to a text file when the config is included in the kernel with CONFIG_IKCONFIG. By default, the file written is called config.txt, but it can be any user supplied filename as well. If the kernel config is in a module (configs.ko), then it can be loaded along with symbols for the module loaded with 'lx-symbols' and then this command will still work. Obviously if you have the whole vmlinux then this can also be achieved with scripts/extract-ikconfig, but this gdb script can be useful to confirm that the memory contents of the config in memory and the vmlinux contents on disk match what is expected. [swboyd@chromium.org: v2] Link: http://lkml.kernel.org/r/20190329220844.38234-3-swboyd@chromium.org Link: http://lkml.kernel.org/r/20190325184522.260535-3-swboyd@chromium.org Signed-off-by: Stephen Boyd <swboyd@chromium.org> Cc: Douglas Anderson <dianders@chromium.org> Cc: Nikolay Borisov <n.borisov.lkml@gmail.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jackie Liu <liuyun01@kylinos.cn> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-15Revert "scripts/gdb: add a Radix Tree Parser"Kieran Bingham1-1/+0
This reverts commit e127a73d41ac ("scripts/gdb: add a Radix Tree Parser") The python implementation of radix-tree was merged at the same time as the radix-tree system was heavily reworked from commit e9256efcc8e3 ("radix-tree: introduce radix_tree_empty") to 3bcadd6fa6c4 ("radix-tree: free up the bottom bit of exceptional entries for reuse") and no longer functions, but also prevents other gdb scripts from loading. This functionality has not yet hit a release, so simply remove it for now Link: http://lkml.kernel.org/r/1467127337-11135-6-git-send-email-kieran@bingham.xyz Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-24scripts/gdb: add a Radix Tree ParserKieran Bingham1-0/+1
Linux makes use of the Radix Tree data structure to store pointers indexed by integer values. This structure is utilised across many structures in the kernel including the IRQ descriptor tables, and several filesystems. This module provides a method to lookup values from a structure given its head node. Usage: The function lx_radix_tree_lookup, must be given a symbol of type struct radix_tree_root, and an index into that tree. The object returned is a generic integer value, and must be cast correctly to the type based on the storage in the data structure. For example, to print the irq descriptor in the sparse irq_desc_tree at index 18, try the following: (gdb) print (struct irq_desc)$lx_radix_tree_lookup(irq_desc_tree, 18) Link: http://lkml.kernel.org/r/d2028c55e50cf95a9b7f8ca0d11885174b0cc709.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-24scripts/gdb: provide linux constantsKieran Bingham1-0/+1
Some macro's and defines are needed when parsing memory, and without compiling the kernel as -g3 they are not available in the debug-symbols. We use the pre-processor here to extract constants to a dedicated module for the linux debugger extensions Top level Kbuild is used to call in and generate the constants file, while maintaining dependencies on autogenerated files in include/generated Link: http://lkml.kernel.org/r/bc3df9c25f57ea72177c066a51a446fc19e2c27f.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Michal Marek <mmarek@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-03-23scripts/gdb: add version commandKieran Bingham1-0/+1
lx-version Report the Linux Version of the current kernel. Add a command to identify the version specified by the banner in the debugged kernel. This lets the user identify the kernel of the running kernel, and will let later scripts compare the banner of the attached kernel against the banner in the vmlinux symbols files to verify that the files are correct. [jan.kiszka@siemens.com: remove blank line from help output and fix pep8 warning] Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-07-01scripts/gdb: add command to check list consistencyThiébaud Weksteen1-0/+1
Add a gdb script to verify the consistency of lists. Signed-off-by: Thiébaud Weksteen <thiebaud@weksteen.fr> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-18scripts/gdb: add internal helper and convenience function for per-cpu lookupJan Kiszka1-0/+1
This function allows to obtain a per-cpu variable, either of the current or an explicitly specified CPU. Note: sparc64 version is untested. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ben Widawsky <ben@bwidawsk.net> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-18scripts/gdb: add helper and convenience function to look up tasksJan Kiszka1-0/+1
Add the helper task_by_pid that can look up a task by its PID. Also export it as a convenience function. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ben Widawsky <ben@bwidawsk.net> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-18scripts/gdb: add lx-dmesg commandJan Kiszka1-0/+1
This pokes into the log buffer of the debugged kernel, dumping it to the gdb console. Helping in case the target should or can no longer execute dmesg itself. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kay Sievers <kay@vrfy.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ben Widawsky <ben@bwidawsk.net> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-18scripts/gdb: add internal helper and convenience function to look up a moduleJan Kiszka1-0/+1
Add the internal helper get_module_by_name to obtain the module structure corresponding to the given name. Also export this service as a convenience function. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ben Widawsky <ben@bwidawsk.net> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-18scripts/gdb: add lx-symbols commandJan Kiszka1-0/+1
This is probably the most useful helper when debugging kernel modules: lx-symbols first reloads vmlinux. Then it searches recursively for *.ko files in the specified paths and the current directory. Finally it walks the kernel's module list, issuing the necessary add-symbol-file command for each loaded module so that gdb knows which module symbol corresponds to which address. It also looks up variable sections (bss, data, rodata) and appends their address to the add-symbole-file command line. This allows to access global module variables just like any other variable. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ben Widawsky <ben@bwidawsk.net> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-18scripts/gdb: add container_of helper and convenience functionJan Kiszka1-0/+2
Provide an internal helper with container_of semantics. As type lookups are very slow in gdb-python and we need a type "long" for this, cache the reference to this type object. Then export the helper also as a convenience function form use at the gdb command line. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ben Widawsky <ben@bwidawsk.net> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-18scripts/gdb: add infrastructureJan Kiszka1-0/+23
This provides the basic infrastructure to load kernel-specific python helper scripts when debugging the kernel in gdb. The loading mechanism is based on gdb loading for <objfile>-gdb.py when opening <objfile>. Therefore, this places a corresponding link to the main helper script into the output directory that contains vmlinux. The main scripts will pull in submodules containing Linux specific gdb commands and functions. To avoid polluting the source directory with compiled python modules, we link to them from the object directory. Due to gdb.parse_and_eval and string redirection for gdb.execute, we depend on gdb >= 7.2. This feature is enabled via CONFIG_GDB_SCRIPTS. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Acked-by: Michal Marek <mmarek@suse.cz> [kbuild stuff] Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Ben Widawsky <ben@bwidawsk.net> Cc: Borislav Petkov <bp@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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