From f8ed85ac992c48814d916d5df4d44f9a971c5de4 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Fri, 11 Sep 2015 16:51:43 +0200 Subject: Fix bad error handling after memory_region_init_ram() Symptom: $ qemu-system-x86_64 -m 10000000 Unexpected error in ram_block_add() at /work/armbru/qemu/exec.c:1456: upstream-qemu: cannot set up guest memory 'pc.ram': Cannot allocate memory Aborted (core dumped) Root cause: commit ef701d7 screwed up handling of out-of-memory conditions. Before the commit, we report the error and exit(1), in one place, ram_block_add(). The commit lifts the error handling up the call chain some, to three places. Fine. Except it uses &error_abort in these places, changing the behavior from exit(1) to abort(), and thus undoing the work of commit 3922825 "exec: Don't abort when we can't allocate guest memory". The three places are: * memory_region_init_ram() Commit 4994653 (right after commit ef701d7) lifted the error handling further, through memory_region_init_ram(), multiplying the incorrect use of &error_abort. Later on, imitation of existing (bad) code may have created more. * memory_region_init_ram_ptr() The &error_abort is still there. * memory_region_init_rom_device() Doesn't need fixing, because commit 33e0eb5 (soon after commit ef701d7) lifted the error handling further, and in the process changed it from &error_abort to passing it up the call chain. Correct, because the callers are realize() methods. Fix the error handling after memory_region_init_ram() with a Coccinelle semantic patch: @r@ expression mr, owner, name, size, err; position p; @@ memory_region_init_ram(mr, owner, name, size, ( - &error_abort + &error_fatal | err@p ) ); @script:python@ p << r.p; @@ print "%s:%s:%s" % (p[0].file, p[0].line, p[0].column) When the last argument is &error_abort, it gets replaced by &error_fatal. This is the fix. If the last argument is anything else, its position is reported. This lets us check the fix is complete. Four positions get reported: * ram_backend_memory_alloc() Error is passed up the call chain, ultimately through user_creatable_complete(). As far as I can tell, it's callers all handle the error sanely. * fsl_imx25_realize(), fsl_imx31_realize(), dp8393x_realize() DeviceClass.realize() methods, errors handled sanely further up the call chain. We're good. Test case again behaves: $ qemu-system-x86_64 -m 10000000 qemu-system-x86_64: cannot set up guest memory 'pc.ram': Cannot allocate memory [Exit 1 ] The next commits will repair the rest of commit ef701d7's damage. Signed-off-by: Markus Armbruster Message-Id: <1441983105-26376-3-git-send-email-armbru@redhat.com> Reviewed-by: Peter Crosthwaite --- hw/arm/armv7m.c | 2 +- hw/arm/exynos4210.c | 8 ++++---- hw/arm/highbank.c | 2 +- hw/arm/integratorcp.c | 2 +- hw/arm/mainstone.c | 2 +- hw/arm/musicpal.c | 2 +- hw/arm/omap1.c | 2 +- hw/arm/omap2.c | 2 +- hw/arm/omap_sx1.c | 4 ++-- hw/arm/palm.c | 2 +- hw/arm/pxa2xx.c | 8 ++++---- hw/arm/realview.c | 6 +++--- hw/arm/spitz.c | 2 +- hw/arm/stellaris.c | 4 ++-- hw/arm/stm32f205_soc.c | 4 ++-- hw/arm/tosa.c | 2 +- hw/arm/vexpress.c | 6 +++--- hw/arm/xilinx_zynq.c | 2 +- hw/arm/xlnx-zynqmp.c | 2 +- 19 files changed, 32 insertions(+), 32 deletions(-) (limited to 'hw/arm') diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c index c6eab6d..40334d7 100644 --- a/hw/arm/armv7m.c +++ b/hw/arm/armv7m.c @@ -229,7 +229,7 @@ qemu_irq *armv7m_init(MemoryRegion *system_memory, int mem_size, int num_irq, /* Hack to map an additional page of ram at the top of the address space. This stops qemu complaining about executing code outside RAM when returning from an exception. */ - memory_region_init_ram(hack, NULL, "armv7m.hack", 0x1000, &error_abort); + memory_region_init_ram(hack, NULL, "armv7m.hack", 0x1000, &error_fatal); vmstate_register_ram_global(hack); memory_region_add_subregion(system_memory, 0xfffff000, hack); diff --git a/hw/arm/exynos4210.c b/hw/arm/exynos4210.c index c55fab8..d934980 100644 --- a/hw/arm/exynos4210.c +++ b/hw/arm/exynos4210.c @@ -259,7 +259,7 @@ Exynos4210State *exynos4210_init(MemoryRegion *system_mem, /* Internal ROM */ memory_region_init_ram(&s->irom_mem, NULL, "exynos4210.irom", - EXYNOS4210_IROM_SIZE, &error_abort); + EXYNOS4210_IROM_SIZE, &error_fatal); vmstate_register_ram_global(&s->irom_mem); memory_region_set_readonly(&s->irom_mem, true); memory_region_add_subregion(system_mem, EXYNOS4210_IROM_BASE_ADDR, @@ -275,7 +275,7 @@ Exynos4210State *exynos4210_init(MemoryRegion *system_mem, /* Internal RAM */ memory_region_init_ram(&s->iram_mem, NULL, "exynos4210.iram", - EXYNOS4210_IRAM_SIZE, &error_abort); + EXYNOS4210_IRAM_SIZE, &error_fatal); vmstate_register_ram_global(&s->iram_mem); memory_region_add_subregion(system_mem, EXYNOS4210_IRAM_BASE_ADDR, &s->iram_mem); @@ -284,14 +284,14 @@ Exynos4210State *exynos4210_init(MemoryRegion *system_mem, mem_size = ram_size; if (mem_size > EXYNOS4210_DRAM_MAX_SIZE) { memory_region_init_ram(&s->dram1_mem, NULL, "exynos4210.dram1", - mem_size - EXYNOS4210_DRAM_MAX_SIZE, &error_abort); + mem_size - EXYNOS4210_DRAM_MAX_SIZE, &error_fatal); vmstate_register_ram_global(&s->dram1_mem); memory_region_add_subregion(system_mem, EXYNOS4210_DRAM1_BASE_ADDR, &s->dram1_mem); mem_size = EXYNOS4210_DRAM_MAX_SIZE; } memory_region_init_ram(&s->dram0_mem, NULL, "exynos4210.dram0", mem_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(&s->dram0_mem); memory_region_add_subregion(system_mem, EXYNOS4210_DRAM0_BASE_ADDR, &s->dram0_mem); diff --git a/hw/arm/highbank.c b/hw/arm/highbank.c index f8353a7..960bc39 100644 --- a/hw/arm/highbank.c +++ b/hw/arm/highbank.c @@ -281,7 +281,7 @@ static void calxeda_init(MachineState *machine, enum cxmachines machine_id) sysram = g_new(MemoryRegion, 1); memory_region_init_ram(sysram, NULL, "highbank.sysram", 0x8000, - &error_abort); + &error_fatal); memory_region_add_subregion(sysmem, 0xfff88000, sysram); if (bios_name != NULL) { sysboot_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); diff --git a/hw/arm/integratorcp.c b/hw/arm/integratorcp.c index 0fbbf99..d87d36f 100644 --- a/hw/arm/integratorcp.c +++ b/hw/arm/integratorcp.c @@ -266,7 +266,7 @@ static int integratorcm_init(SysBusDevice *dev) s->cm_refcnt_offset = muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), 24, 1000); memory_region_init_ram(&s->flash, OBJECT(s), "integrator.flash", 0x100000, - &error_abort); + &error_fatal); vmstate_register_ram_global(&s->flash); memory_region_init_io(&s->iomem, OBJECT(s), &integratorcm_ops, s, diff --git a/hw/arm/mainstone.c b/hw/arm/mainstone.c index 0da02a6..03e9fa5 100644 --- a/hw/arm/mainstone.c +++ b/hw/arm/mainstone.c @@ -124,7 +124,7 @@ static void mainstone_common_init(MemoryRegion *address_space_mem, /* Setup CPU & memory */ mpu = pxa270_init(address_space_mem, mainstone_binfo.ram_size, cpu_model); memory_region_init_ram(rom, NULL, "mainstone.rom", MAINSTONE_ROM, - &error_abort); + &error_fatal); vmstate_register_ram_global(rom); memory_region_set_readonly(rom, true); memory_region_add_subregion(address_space_mem, 0, rom); diff --git a/hw/arm/musicpal.c b/hw/arm/musicpal.c index 42f66b3..5cff3d4 100644 --- a/hw/arm/musicpal.c +++ b/hw/arm/musicpal.c @@ -1599,7 +1599,7 @@ static void musicpal_init(MachineState *machine) memory_region_add_subregion(address_space_mem, 0, ram); memory_region_init_ram(sram, NULL, "musicpal.sram", MP_SRAM_SIZE, - &error_abort); + &error_fatal); vmstate_register_ram_global(sram); memory_region_add_subregion(address_space_mem, MP_SRAM_BASE, sram); diff --git a/hw/arm/omap1.c b/hw/arm/omap1.c index 8873f94..6b1c076 100644 --- a/hw/arm/omap1.c +++ b/hw/arm/omap1.c @@ -3872,7 +3872,7 @@ struct omap_mpu_state_s *omap310_mpu_init(MemoryRegion *system_memory, s->sdram_size); memory_region_add_subregion(system_memory, OMAP_EMIFF_BASE, &s->emiff_ram); memory_region_init_ram(&s->imif_ram, NULL, "omap1.sram", s->sram_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(&s->imif_ram); memory_region_add_subregion(system_memory, OMAP_IMIF_BASE, &s->imif_ram); diff --git a/hw/arm/omap2.c b/hw/arm/omap2.c index 1ee2d61..98ee19f 100644 --- a/hw/arm/omap2.c +++ b/hw/arm/omap2.c @@ -2271,7 +2271,7 @@ struct omap_mpu_state_s *omap2420_mpu_init(MemoryRegion *sysmem, s->sdram_size); memory_region_add_subregion(sysmem, OMAP2_Q2_BASE, &s->sdram); memory_region_init_ram(&s->sram, NULL, "omap2.sram", s->sram_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(&s->sram); memory_region_add_subregion(sysmem, OMAP2_SRAM_BASE, &s->sram); diff --git a/hw/arm/omap_sx1.c b/hw/arm/omap_sx1.c index 4b0f7f9..4de88f3 100644 --- a/hw/arm/omap_sx1.c +++ b/hw/arm/omap_sx1.c @@ -122,7 +122,7 @@ static void sx1_init(MachineState *machine, const int version) /* External Flash (EMIFS) */ memory_region_init_ram(flash, NULL, "omap_sx1.flash0-0", flash_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(flash); memory_region_set_readonly(flash, true); memory_region_add_subregion(address_space, OMAP_CS0_BASE, flash); @@ -166,7 +166,7 @@ static void sx1_init(MachineState *machine, const int version) (dinfo = drive_get(IF_PFLASH, 0, fl_idx)) != NULL) { MemoryRegion *flash_1 = g_new(MemoryRegion, 1); memory_region_init_ram(flash_1, NULL, "omap_sx1.flash1-0", flash1_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(flash_1); memory_region_set_readonly(flash_1, true); memory_region_add_subregion(address_space, OMAP_CS1_BASE, flash_1); diff --git a/hw/arm/palm.c b/hw/arm/palm.c index 7f1cfb8..1f84dbf 100644 --- a/hw/arm/palm.c +++ b/hw/arm/palm.c @@ -213,7 +213,7 @@ static void palmte_init(MachineState *machine) /* External Flash (EMIFS) */ memory_region_init_ram(flash, NULL, "palmte.flash", flash_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(flash); memory_region_set_readonly(flash, true); memory_region_add_subregion(address_space_mem, OMAP_CS0_BASE, flash); diff --git a/hw/arm/pxa2xx.c b/hw/arm/pxa2xx.c index ec56b61..164260a 100644 --- a/hw/arm/pxa2xx.c +++ b/hw/arm/pxa2xx.c @@ -2078,11 +2078,11 @@ PXA2xxState *pxa270_init(MemoryRegion *address_space, /* SDRAM & Internal Memory Storage */ memory_region_init_ram(&s->sdram, NULL, "pxa270.sdram", sdram_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(&s->sdram); memory_region_add_subregion(address_space, PXA2XX_SDRAM_BASE, &s->sdram); memory_region_init_ram(&s->internal, NULL, "pxa270.internal", 0x40000, - &error_abort); + &error_fatal); vmstate_register_ram_global(&s->internal); memory_region_add_subregion(address_space, PXA2XX_INTERNAL_BASE, &s->internal); @@ -2212,11 +2212,11 @@ PXA2xxState *pxa255_init(MemoryRegion *address_space, unsigned int sdram_size) /* SDRAM & Internal Memory Storage */ memory_region_init_ram(&s->sdram, NULL, "pxa255.sdram", sdram_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(&s->sdram); memory_region_add_subregion(address_space, PXA2XX_SDRAM_BASE, &s->sdram); memory_region_init_ram(&s->internal, NULL, "pxa255.internal", - PXA2XX_INTERNAL_SIZE, &error_abort); + PXA2XX_INTERNAL_SIZE, &error_fatal); vmstate_register_ram_global(&s->internal); memory_region_add_subregion(address_space, PXA2XX_INTERNAL_BASE, &s->internal); diff --git a/hw/arm/realview.c b/hw/arm/realview.c index ef2788d..23779ec 100644 --- a/hw/arm/realview.c +++ b/hw/arm/realview.c @@ -151,13 +151,13 @@ static void realview_init(MachineState *machine, low_ram_size = ram_size - 0x20000000; ram_size = 0x20000000; memory_region_init_ram(ram_lo, NULL, "realview.lowmem", low_ram_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(ram_lo); memory_region_add_subregion(sysmem, 0x20000000, ram_lo); } memory_region_init_ram(ram_hi, NULL, "realview.highmem", ram_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(ram_hi); low_ram_size = ram_size; if (low_ram_size > 0x10000000) @@ -353,7 +353,7 @@ static void realview_init(MachineState *machine, BootROM happens to be in ROM/flash or in memory that isn't clobbered until after Linux boots the secondary CPUs. */ memory_region_init_ram(ram_hack, NULL, "realview.hack", 0x1000, - &error_abort); + &error_fatal); vmstate_register_ram_global(ram_hack); memory_region_add_subregion(sysmem, SMP_BOOT_ADDR, ram_hack); diff --git a/hw/arm/spitz.c b/hw/arm/spitz.c index fdb1010..6c2cbcb 100644 --- a/hw/arm/spitz.c +++ b/hw/arm/spitz.c @@ -913,7 +913,7 @@ static void spitz_common_init(MachineState *machine, sl_flash_register(mpu, (model == spitz) ? FLASH_128M : FLASH_1024M); - memory_region_init_ram(rom, NULL, "spitz.rom", SPITZ_ROM, &error_abort); + memory_region_init_ram(rom, NULL, "spitz.rom", SPITZ_ROM, &error_fatal); vmstate_register_ram_global(rom); memory_region_set_readonly(rom, true); memory_region_add_subregion(address_space_mem, 0, rom); diff --git a/hw/arm/stellaris.c b/hw/arm/stellaris.c index ca4628b..a76f051 100644 --- a/hw/arm/stellaris.c +++ b/hw/arm/stellaris.c @@ -1231,13 +1231,13 @@ static void stellaris_init(const char *kernel_filename, const char *cpu_model, /* Flash programming is done via the SCU, so pretend it is ROM. */ memory_region_init_ram(flash, NULL, "stellaris.flash", flash_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(flash); memory_region_set_readonly(flash, true); memory_region_add_subregion(system_memory, 0, flash); memory_region_init_ram(sram, NULL, "stellaris.sram", sram_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(sram); memory_region_add_subregion(system_memory, 0x20000000, sram); diff --git a/hw/arm/stm32f205_soc.c b/hw/arm/stm32f205_soc.c index 0f3bdc7..4d26a7e 100644 --- a/hw/arm/stm32f205_soc.c +++ b/hw/arm/stm32f205_soc.c @@ -71,7 +71,7 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp) MemoryRegion *flash_alias = g_new(MemoryRegion, 1); memory_region_init_ram(flash, NULL, "STM32F205.flash", FLASH_SIZE, - &error_abort); + &error_fatal); memory_region_init_alias(flash_alias, NULL, "STM32F205.flash.alias", flash, 0, FLASH_SIZE); @@ -84,7 +84,7 @@ static void stm32f205_soc_realize(DeviceState *dev_soc, Error **errp) memory_region_add_subregion(system_memory, 0, flash_alias); memory_region_init_ram(sram, NULL, "STM32F205.sram", SRAM_SIZE, - &error_abort); + &error_fatal); vmstate_register_ram_global(sram); memory_region_add_subregion(system_memory, SRAM_BASE_ADDRESS, sram); diff --git a/hw/arm/tosa.c b/hw/arm/tosa.c index 73572eb..2c216e9 100644 --- a/hw/arm/tosa.c +++ b/hw/arm/tosa.c @@ -227,7 +227,7 @@ static void tosa_init(MachineState *machine) mpu = pxa255_init(address_space_mem, tosa_binfo.ram_size); - memory_region_init_ram(rom, NULL, "tosa.rom", TOSA_ROM, &error_abort); + memory_region_init_ram(rom, NULL, "tosa.rom", TOSA_ROM, &error_fatal); vmstate_register_ram_global(rom); memory_region_set_readonly(rom, true); memory_region_add_subregion(address_space_mem, 0, rom); diff --git a/hw/arm/vexpress.c b/hw/arm/vexpress.c index 0f8bf1c..da8301a 100644 --- a/hw/arm/vexpress.c +++ b/hw/arm/vexpress.c @@ -391,7 +391,7 @@ static void a15_daughterboard_init(const VexpressMachineState *vms, /* 0x2b0a0000: PL341 dynamic memory controller: not modelled */ /* 0x2e000000: system SRAM */ memory_region_init_ram(sram, NULL, "vexpress.a15sram", 0x10000, - &error_abort); + &error_fatal); vmstate_register_ram_global(sram); memory_region_add_subregion(sysmem, 0x2e000000, sram); @@ -671,13 +671,13 @@ static void vexpress_common_init(MachineState *machine) sram_size = 0x2000000; memory_region_init_ram(sram, NULL, "vexpress.sram", sram_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(sram); memory_region_add_subregion(sysmem, map[VE_SRAM], sram); vram_size = 0x800000; memory_region_init_ram(vram, NULL, "vexpress.vram", vram_size, - &error_abort); + &error_fatal); vmstate_register_ram_global(vram); memory_region_add_subregion(sysmem, map[VE_VIDEORAM], vram); diff --git a/hw/arm/xilinx_zynq.c b/hw/arm/xilinx_zynq.c index a4e7b5c..37dc0b0 100644 --- a/hw/arm/xilinx_zynq.c +++ b/hw/arm/xilinx_zynq.c @@ -167,7 +167,7 @@ static void zynq_init(MachineState *machine) /* 256K of on-chip memory */ memory_region_init_ram(ocm_ram, NULL, "zynq.ocm_ram", 256 << 10, - &error_abort); + &error_fatal); vmstate_register_ram_global(ocm_ram); memory_region_add_subregion(address_space_mem, 0xFFFC0000, ocm_ram); diff --git a/hw/arm/xlnx-zynqmp.c b/hw/arm/xlnx-zynqmp.c index 2185542..a9097f9 100644 --- a/hw/arm/xlnx-zynqmp.c +++ b/hw/arm/xlnx-zynqmp.c @@ -113,7 +113,7 @@ static void xlnx_zynqmp_realize(DeviceState *dev, Error **errp) char *ocm_name = g_strdup_printf("zynqmp.ocm_ram_bank_%d", i); memory_region_init_ram(&s->ocm_ram[i], NULL, ocm_name, - XLNX_ZYNQMP_OCM_RAM_SIZE, &error_abort); + XLNX_ZYNQMP_OCM_RAM_SIZE, &error_fatal); vmstate_register_ram_global(&s->ocm_ram[i]); memory_region_add_subregion(get_system_memory(), XLNX_ZYNQMP_OCM_RAM_0_ADDRESS + -- cgit v1.1